Headphone amplifier



FIG. 1 is a perspective view of a headphone amplifier;

FIG. 2 is a front view of the headphone amplifier;

FIG. 3 is a back view of the headphone amplifier;

FIG. 4 left side view of the headphone amplifier;

FIG. 5 is a right side view of the headphone amplifier;

FIG. 6 is a top view of the headphone amplifier; and,

FIG. 7 is a bottom view of the headphone amplifier.

The broken lines shown are included for the purpose of illustratingportions of the headphone amplifier that form no part of the claim.

CLAIM What is claimed is the ornamental design for a headphoneamplifier, as shown and described.